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Is an application uses query and set major:minor
to device, it should not fallback to default major by default.
Add new function whoich allows that (and use it in lvm2).
- it can support multiple segments, but note that
to work properly, correct IV (initialization vector)
offset parameter must be set properly.
Because most usage of IV start offset is when we join
several crypto segments together (so iv_offset is the segment
start offset), DM_CRYPT_IV_DEFAULT is defined to simplify
the process.
Function accepts the string in cipher agrument (already
including chainmode and iv type; chainmode and iv parameters are NULL
in this case) or user can provide split parameters which will
join into dm-crypt cipher specification "cipher-chainmode-iv".
All these parameters must be supplied in correct dm-crypt format.
In libdm/Makefile.in, we need to cleanup the symlink properly.
Adding to CLEAN_TARGETS seemed like the simplest way to do this
in the current build framework. We could redo dependencies for
VERSIONED_SHLIB, but for now just add to CLEAN_TARGETS.
For scripts/Makefile.in, we should be adding to DISTCLEAN_TARGETS.
The generic rule in make.tmpl.in takes care of the cleanup.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Author: Takahiro Yasui <tyasui@redhat.com>
When reporting explicitly label attributes (pv_uuid for example), we do not
need to read metadata.
This patch separate the label fileds and removes scan_vgs_for_pvs
in process_each_pv() if not needed.
(There should be no user visible change in output.)
In libdm, we only ever use 'fields', while the tools use 'options' and
'fields' interchangeably.
Ideally it would be good to use 'fields' consistently everywhere.
However, 'options' most likely comes from the tool commandline '-o' and
'--options' which cannot be changed.
For example in LVM2, "pv_all" gives all PV fields.
"seg_all" gives all LV segment fields.
"all" gives all fields of the final report type. I think this is more
useful than just adding the current prefix.
So "lvs -o seg_all" gives all the LV segment fields, whilst
"lvs --segments -o all" adds in LV and VG fields too.
"lvs -o all -O vg_name" has report type LVS+VGS so includes all LV and all
VG fields.
Checks added for DM device names to allow only names < DM_NAME_LEN,
otherwise a part of lengthy name would be silently ignored and could
cause confusion while using dmsetup. Also, the name should not contain
'/' character, if it is used in context of creating a new device
or renaming the existing one (because we do not consider full path
to devices, they do not exist in filesystem yet) and appropriate error
messages are shown.
